Stone-dressing machine



{No Model.) 3 Sheets-Sheet 1.

G LOHR. J 'STO-NE DRESSING MACHINE.

Patented 0G11. Z0, 1896.

fue warms ricas co. wom-WHO.. wmmrmu. u. c.

3 Sheets-Sheet 2.

(No Model.)

G. LOHR. STONE DRESSING MACHINE.

No. 569,719. Patented Oct. 20, 1896.

ma ohms verras co. woraufuo., wnsrmmron u c 3 Sheets-Sheet 3,

(No Modem' C. LOHR. STONE DRESSING MACHINE.

No. 569,719. Patented 001;. 20, 1896.

W m. W19

. UNITED 4STATES PATENT Fries..

CHARLES LOHR, OF MILVAUKFE, lVISCONSlN.

STONE-DRESSING MACHINE.

SPECIFICATION forming part of Letters Patent No. 569,719, dated October20, 1896.

Application led August 25, 1896. Serial No. 603,842. (No model.)

To all whom, it may concern:

Be it, known that l, CHARLES LOHR, a citizen of the United States, and aresident of Milwaukee, in the county of Milwaukee and State ofllvisccnsin, have invented certain new and useful Improvements in Stone-Dressing Machines; andl do hereby declare that the following is a full,clear, and exact description thereof.

My invention relates to stone-dressing machines 5 and it consists incertain peculiarities of construction and combination of parts,hereinat'ter set forth, and subsequently claimed.

ln the drawings, Figure l is a side elevation of thy-improved device,partly in section, on the line l l of Fig. 2. Fig. 2 is a frontelevation ot' my said device, partly broken away or in section to betterillustrate lcertain details of construction. Fig. 3 is a horizolr talsectional view on the line 3 3 of Fig. 2. Fig. 4C is a detail sectionalview on the line a i of Fig. 2. Fig. 5 is a like sectional view on theline 5 5 of Fig. 2.

Referring to the drawings, A are supporting and guide columns forming apart oi' the frame of my machine.

C C' C' represent the horizontal upper timbers of said frame.

D D' are vertical rack-bars secured to the inner faces of the hollowcolumns A B.

E is a horizontal sliding head having ends c e', which have verticalmovement between the adjacent exterior faces of the columns A A and BB', respectively. Secured to the front face of the head E, as by bolts ac', are horizontal shouldered rails F F', and G G are the side pieces ofa carriage, which side pieces rest against and upon the said rails, asbest shown in Fig. 4.

H Il are brackets, whose lower ends 7i h' rest against and are securedto the head E and rails F F', as best shown in Fig. 5, said ends beingprovided with bearings l) IJ' for the reception of a shaft l, having atits opposite ends pinions cc for engagement with the described rackbarsD D', while the upper ends of said brackets are provided with boxes d dfor the reception of another shaft, J. From the upper part of the box dof bracket Il there extends an arm K, terminating in a split collar fffor the reception of the hub of a bevel-pinion K', which meshes A and BB'.

with a beve-l gear-wheel L, fast on the adjacent end of the describedshaft J. Through the pinion K' and itshub there extends a verticalshat't L', provided with a longitudinal groove g, by means of which anda keyT or feather (not shown) on said hub the said shaft and pinion arerevolved together, the said shaft L being stepped in a suitable bearingg in the base of the frame and provided at its upper end (above theupper timber G) with fast and loose pulleys t i', whereby belting from asuitable source ot power may be applied to operate the machine throughthe shaft J, as hereinafter described.

The top of the frame is provided with a series of pulleys j, mounted insuitable blocks, and suitable cables or analogous devices j' areAsecured to the brackets H H' and pass up over these pulleys, and attheir free ends carry counter-weights it', as shown in Figs. 1 and 2.

The shaft J is provided with an exterior longitudinal groove J", andbetween the described side pieces G G of the carriage said shaft carriesa series of disks M M, each having cast therewith or secured thereto aseries of radially-disposed curved tappet-arms 3l' lll. There is asuitable key or feather inthe described groove J to spline the disks Mto the shaft J and permit longitudinal movement of the carriage anddisks on said shaft.

N is another shaft, journaled in suitable bearings 71; 7;. of the sidepieces G G of the carriage, and having secured thereto a series ofbell-crank levers N N', whose upper arms have curved ends for successiveengagement with the tappet-arms M M oi' the disks M, and whose lowerarms are connected by links on. to the shanks m. of hammers O.

The lower part of the carriage that carries the hammers has end platesan bolted to the side pieces G G', a bottom plate n', and a back plateo, which latter bears against the forward faces of the rails F F', andto the rear face of this back Vpla-te o there is bolted a shoulderedblock o', which corresponds in shape to the shouldered rails, to slidebetween their opposin g shouldered faces, as best shown in Fig. l.

l is the cl1iscl-board, whose .rear portion is supported upon and boltedto the bottom plate n and whose front portion at each side ICO extendsunder and is bolted to the side pieces G G' of the carriage, and whichis provided with angularly-disposed perforations to receive the chiselsP. There are two series of these perfor-ations p p, coinciding at thetop of the chisel-board, but diverging as they extend downward, so thatthe chisels may be set with their points extending forward r backward,as desired, but with their heads substantially in the same location ineither instance.

Q isa spring-plate extending between the end plates n n of the carriage,and Q' Q are partitions resting against and secured to the bottom platen and back plate 0 of the carriage. The hammer-Shanks m terminate ineyes, by means of which they are secured to a transverse rod q, passingthrough the partitions Q', and springs q' q bear on the upper surfacesof said hammer-Shanks, the upper ends of said springs being secured tothe spring-plate Q, as best shown in Fig. 1.

R is a housing bolted to the side piece G' and containing a collar R',which surrounds shaft I. This shaft has an exterior longitudinal grooveI', by means of which it is held to the said collar R by a suitable keyor feather, so that the collar will revolve with the shaft, but becapable of being moved longitudinally thereon, as afterward explained.The collar R is provided with a circumferential series of openings r 9"in its periphery, and the housing R has a set-screw r, while the slidinghead E is formed with a series of toothed or notched indentations E onits front face, as best shown in Fig. 2.

S is the platform that receives the stone X to be dressed, and thisplatform is provided with suitable axles t t and wheels T T, travclingupon rails T' T', and from the under side of said platform there dependrack-bars U U for engagement with pinions V V on a shaft IV, mounted insuitable bearings and carrying at its end a proper gear-wheel Y forengagement with the power (not shown) for operating the platform.

The operation of my improved machine will be readily understood from theforegoing description of its construction, taken in connection with theaccompanying drawings, it being understood that the object of myinvention is to devise means for imparting to stone-dressing chisels thesame impact and action by machinery as they now receive when operated byhand, and thereby to expedite the operation of dressing stone anddecrease the labor required.

Let it be understood that the parts are arranged in the relativepositions shown in Fig. l. Now when power is applied to the verticalshaft L', Fig. 2, by means of a belt (not shown) applied to the fastpulley t' the said shaft will be revolved, and this, through thelgear-wheels K' L, will revolve the shaft J, and with it the disks M andtheir tappetarms M', thus causing the hammers O O to fall successivelyupon the heads of the chisels I" 1)', and as the platform S is beingmoved forward all the time by any suitable power (not shown) thiscontinues until the chisels have operated entirely across the face ofthe stone. The power is then stopped, (as by shifting the belts, orotherwise,) and, if desired', the

chisels may-be set in the other series of perforations and a pinch-barinserted in one of the toothed notches E' and leverage exerted againstone of the side pieces G or G of the carriage to move the same therequired dis tance on the shafts I J, so as to bring the chisels in linewith the uncut portions of the stone adjacent to the paths just cut, andthe machine started up, with the carriage S moving in the reversedirection to that of its first travel, at the end of which the power isagain stopped, the chisels reset to their original positions, and theoriginal operation repeated, and so on until the entire top surface isdressed. Now if it is desired to go over the surface again for a deepercut it becomes necessary to lower the carriage. To do this, first theset-screw 1 in the housing R is loosened. The 'carriage ispractically.counterbalanced by the weights 7c 2c, and to lower it a rodor lever is inserted into the openings o" of the collar R', and thelatter, and with it the shaft I, is turned the required distance, theengagement of the rack-bars D D and the pinions c c" on the ends of theshaft I insuring that the descent shall be equal at both ends, and thenthe set-.screw 9 is again tightened, and themachine is ready for thenext cut.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a stone-dressing machine, the combination of vertical supportingand guide columns, a vertically-arranged power-shaft having alongitudinal groove therein, and a vertically-movable pinion splinedthereto, a oounterbalanced sliding head movable in said guide-columns, atransverse horizontal shaft geared to said pinion on the vertical shaftand supported on said sliding head, and carrying revolving tappet-arms,a carriage supported by and horizontally movable on said sliding headand transverse shaft, a chisel-board supported by said carriage, andhaving chisels adjustably arranged therein, a series of hammerspivotally attached to said carriage in line with said chisels, a seriesof bell-crank levers journaled in said carriage in engagement with saidtappet-arms, links connecting said hammers with said levers, and abracket-arm on said sliding head connected to and supporting the pinionon z the said vertical sh'aft, substantially as set forth. l

2. In a stone-dressing machine, the combination of vertical supportingand guide columns, vertical rack-bars on said columns, avertically-arran ged power-shaft having a lon gitudinal groove thereinand a verticallymovable pinion splined thereto, a counterbalancedhorizontal transverse sliding head IIO ige v vertically movable in saidguide-columns, brackets .rising from said sliding head, and one of saidbrackets having an arm connected to and supporting the pinion on thevertical shaft, a transverse horizontal shaft journaled in saidbrackets, and geared to the pinion on the vertical shaft, revolvingtappet arms splined to said transverse shaft and capable of longitudinalmovement thereon, a carriage supported by and horizontally movable onsaid sliding head and transverse shaft, a chisel-board with adjustablechisels, pivoted spring-controlled hammers, and bell-crank levers linkedto said hammers and in engagement with said tappet-arms, all carried bysaid carriage, another transverse horizontal shaft journaled in saidbrackets and carrying pinions at its ends in engagement with therack-bars on the vertical columns, and means for controlling therevolution of said last-named transverse shaft, substantially as setforth.

3. In a stone-dressing machine, the combi-- nation of verticalsupporting and guide columns, a vertically-arran ged power-shaft havinga longitudinal groove therein and a verticallymovable pinion splinedthereto, a counterbalanced horizontal transverse sliding head verticallymovable in said guidecolumns and provided with a series of toothed ornotched indentatious in its front face, brackets rising from saidsliding head and oneof said brackets having an arm connected to andsupporting the pinion on the vertical shaft, a horizontal transverseshaft j ournaled in said brackets and geared to the pinion on thevertical shaft, and provided with a longitudinal groove,horizontally-movable revolving disks splined to said transverse shaftand provided with radially-disposed curved tappet-arms, a carriagesupported by and horizontally movable on said sliding head andtransverse shaft, the revolvin g disks and tappet-arms on the latterbeing inc-losed between the side pieces of said carriage, and achiselboard with adjustable chisels, pivoted springcontrolled hammers,and bell-crank levers linked to said hammers and in engagement with saidtappet-arms, all carried by said carriage, substantially as set forth.

In a stone-dressing machine, the combination with a sliding head and arevolving horizontal shaft supported thereby, of a carriage supportedand horizontally movable on said sliding head and shaft, a series ofrevolving disks splined to the shaft and carrying radially-disposedcurved tappet-arms, said disks and arms being inclosed between the sidepieces of said carriage, a chisel-board supported on and secured to saidcarriage and provided with two series of angularly-disposed openingstherethrough, coinciding at top and thence diverging downwardly, chiselsloosely held in said openings, atransverse rod extending through saidcarriage from side to side, a series of hammers having shanks pivotallyattached to said rod, a transverse spring-plate extending across saidcarriage, a series of sprin gs secured to said spring-plate and bearingupon the shanks of said hainmers, and a transverse shaft provided with aseries of bell-crank levers the upper arms of which are in engagementwith said tappetarms, and the lower arms of which are linked to the saidhammer-Shanks, substantially as set forth.

In testimony that I claim the foregoing I have hereunto set my hand, atMilwaukee, in the county of Milwaukee and State of W'isconsin, in thepresence of two witnesses.

CHARLES LOI-IR. lVitn esses:

H. G. UNDERWoon, B. C. RoLoFF.

